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3 years ago

8

Matt scored 98, 57, 72 and 65 on the first four math tests. ON the next test, he scored 100. What was Matt's math average after

the fifth test?
Use your basic arithmetic skills to solve the problem.
Round to the nearest ten if appropriate.

1 answer:

Doss [256]3 years ago

7 0

78.4 exactly but 78 rounded

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2 years ago

What is 12 5/25 as a mixed number in simplest form?<br><br> Enter your answer in the box.

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Step-by-step explanation:

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3 years ago

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A new car sells for $27,500. The value of the car decreases by 14% annually. You want to sell the car when it's worth about $400

NemiM [27]

Answer: 13 years.

Step-by-step explanation:

The price decreases by 14% anually

To find the decimal form, you have 14%/100% = 0.14

So, the year zero, the price is $27,500

After one year, the price is:

P = $27,500 - 0.14*$27500 = $27,500*(0.86)

After the second year, the price is:

P = $27,500*(0.86)^2

and so on, so we want to find x such that:

P = $27,500*(0.86)^x = $4000

0.86^x = $4000/$27,500

Now, using the natural logaritm rule:

a^x = b

x = ln(a)/ln(b)

x = ln($4000/$27,500)/ln(0.86) = 12.8

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3 years ago

The product of nine and a number is added to six the result is 24 what is the number

Andru [333]

Hello!

We can make an equation based on what we know

The product of 9 and a number is

9 * x

Added to six

9 * x + 6

Gives the result of 24

9 * x + 6 = 24

Now you solve it algebraically

Subtract 6 from both sides

9 * x = 18

Divide both sides by 9

x = 2

The answer is 2

Hope this helps!

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3 years ago

The value of a small airplane depreciates exponentially every year after it is purchased. The value, in thousands of dollars, a(

ratelena [41]

Using an exponential function, it is found that the number 131.5 represents the initial value of the plane, in thousands of dollars.

<h3>Exponential function:</h3>

A decaying exponential function is modeled by:

$A(t) = A(0)(1 - r)^t$

In which:

A(0) is the initial value.

r is the decay rate, as a decimal.

In this problem, the function for the value of the airplane after t years is given by:

$A(t) = 131.5(0.8)^t$

Hence A(0) = 131.5, which means that the number 131.5 represents the initial value of the plane, in thousands of dollars.

To learn more about exponential functions, you can take a look at brainly.com/question/8935549

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2 years ago

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